Brush



May 18, 1937*. G. JACOB, JR., ET A1.

BRUSH v 2 Sheets-Sheet l Filed Jan. 17, 1935 IIA INI/fi MIEI May 18,1937. G. Aa JR., T AL 2,080,821

BRUSH Filed Jan. 17, 1955 2 Sheets-Sheet 2 un l" lim " Hllfellllllll 4mlmm U W, l IM fg M- @WM/Q ATTORNEY Patented May 18, 1937 h 2,cso,821

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vpausa George Jacob, Jr., Belleville, and B. Wright, Jr., Montclair, N.J.

Application January 17,1935, Serial No. 2,170

4 claims.

This invention relates in general to brushesv and methods of making themand more particularly to so-called full row brushes as contrasted withtufted or knotted brushes. v

Heretofore, f`ull row brushes-have consisted of rows of bristles whichhave had one end dipped into a plastic composition such as vulcanizedrubber and then secured in a metal ferrule or frame by rivets or nailspassing through said ends. of the rows of bristles and the ferrule, theferrule being connected to a wooden head by nails or the like. Anotherform of full row brush is shown in Patent No. 1,642,974 where the rowsof bristles after having been dipped in the plastic composition areclamped in channels in a metal plate which is secured to the head of thebrush. 'I'hese known methods and structures are complicated andexpensive, requiring complex and expensive apparatus, machines and toolsand large amounts of time and labor.

One object of the present invention is to provide a novel and improvedfull row brush which shall be simple and inexpensive in construction andcan be manufactured at low cost.

Another object is to provide such a brush which shall be strong anddurable wherein the bristles shall be rmly and directly connected to theback or head of the brush without the necessity for rivets` or the likefastening members or specially formed complex holding plates.

Another object is to provide a .novel and improved method of making abrush of this character, and vparticularly novel and improved method forassembling the rows of bristlesand inserting them into the brush back,whereby a great saving in time and labor over known methods shall bepossible.

Other objects are to provide novel and improved means i'or separablyconnecting a handle to the brush back; to provide a novel and improvedstructure whereby the brush can be made entirely of metal except thebristles and the handle; and to obtain other advantages and results *5tion.

Referring to the accompanying drawings in which corresponding and likeparts are desig- -nated throughout the several views by the samereference characters, A y

Figure 1 is a transverse vertical sectional view through a brush showingthe manner of assembling the parts in accordance with the invention.Figure 2 is a similar View showing the com# pleted brush.

as will be brought out by the following descripv Figure 3 is ahorizontal sectional view on the line 3 3 of Figure 1.

lFigure 4 isfa bottom plan view of the brush back.

Figure 5 is an end elevation of brush.

Figure 6 is a vertical longitudinal sectional view through the brush onthe line 6-,6 of Figure 2.

Figure 7 is a view similar to Figure 2 showing 10 a modication of themethod of forming a screw socket for the handle. v g

Figure 8 is a similarv view showing the completed socket and a portionof the cooperating handle. l l 15 Figure 9 is a top plan view of themold block used for making the socket and Figure 10 is a transversesectional view' through a brush having another modification of thehandle socket. 20

Speciiically describing the illustrated embodiment of the invention, thebrush includes a` cuplike back A preferably formed of sheet metal andincluding a bottom I and an upstanding perimetral flange 2 which has aninturned edge 25 3. As shown, the brush back is generally rectangular inplan view and'centrally of 'the back is formed a handle attaching boss 4which has a handle-receiving opening 5. Obviously the back may be ofother shapes, for example, round or 30 oval. f

In making the brush, an interiorly screwthreaded socket shell 6 havingan outturned perimetral flange 'i-is set on the inside of the bottom Iof the back Vwith the ilange resting on the inside of the boss 4 and thesocket aligned with the opening 5 and a liquid plastic composition, -forexample liquid rubber which may be hardened upon vulcanization, isplaced inthe back A as shown in Figure 2. Rows of bristles 9 are ar- 40ranged within an annular ferrule I0 with'one or more spacers II,depending upon the type of brush, extending longitudinally of theferrule and between the rows of bristles and inwardly of the l ends ofthe bristles. 'I'he ferule is preferably of 45 approximately the samesize as the open side of the back, and certain rows of bristles aredisposed between the ferrule and the next adjacent spacers ii, whileother'rows are disposed between the spacers a's shown in Figure 1..Preferably the 50 spacers are atleast partially insertedl within theferrule so as to rmly clamp the rows of bristles in position. Ifdesired, the ends of the bristles the completed 5 may be dipped inliquid composition althoughl this is not necessary. After the bristlesand spacers have been so arranged in the ierrule the ferrule is set uponthe edge of the back and the bristles and spacers are forced into theback as by means of a-knife blade or tool C inserted between thebristles and pressed against the tops of the spacers. 'I'he spacers andthe ends of the bristles are thus embedded in the composition 8, thespacers squeezing the composition around the bristles. Preferably thespacers II are channelshaped with their bases I2 adjacent the bottom ofthe brush back and openings I3 are formed in the bases of the spacers topermit the liquid composition to ow into the channels as shown in Figure2.,; Thereafter, the plastic composition may be vulcanized or hardenedin any known manner. The ferrule I0 may be slipped from the 'oppositeends of the bristles any time after the bristles and spacers have beeninserted into the composition.

When the plastic composition has become hardened the bristles andspacers are firmly embedded in the composition, and the block ofcomposition is firmly held in the back by the inturned flange 3 inaddition to the adhesive contact of the composition with the metal ofthe back. Also, the handle socket 6 is firmly secured in the back sothat a handle D having a screw-threaded portion E corresponding to thesocket B may be threaded into the socket. Preferably the handle has ashoulder F at the inner end of the threaded' portion E to abut theoutside of the bottom I of the back, whereby said bottom is clampedbetween the shoulder and the socket shell. With this construction, thehandle, bottom of the back, the hardened composition ill and the socketshell mutually reenforce each other to prevent bending of said bottomand cracking f the hardened composition.

A modification of the handle socket is shown in Figures '1 and 8 wherethe socket is formed by inserting a screw threaded mold plug I4 throughthe opening 5 in the back prior to placing of the plastic compositioninto the back, so that after hardening of the composition the mold blockmay' be removed and leave a, screw threaded socket I5 in the compositionto receive the screw threaded handle I6. Preferably the mold block wouldbe scaped before insertion into the composition so as to facilitateremoval of the block after the compositionhas hardened. A furthermodication is shown in Figure l0 where the handle socket is shown in theform of a wooden bushing Il inserted into the back and the compositionlike the socket E and having a screw threaded opening iB to receive thehandle.

Et is desirable that the spacers II and back A be so proportioned insize that the bristles are firmly clamped between adjacent spacers andbetween the outer spacers and the flange 2 of the back to supplementthecomposition 8 in binding the bristles and spacers in the back.Furthermore, it is an important feature of the invention that thespacers are embedded in the composition so asto provide substantialreenforcement for the composition block and the back of the brush whenthe composition has hardened.

. While we have shown and described the invention as embodied in certaindetails of construction,

1. A brush comprising a cup-like back having a bottom and an upstandingperimetral flange with an inturned edge, a plastic composition in theback, and a plurality of rows of bristles and spacers embedded in saidcomposition, saiclA spacers being channeled members with their basesadjacent said bottom of the back and their flanges projecting away fromsaid bottom and having perforations in their bases through which saidplastic composition extends into the channels, whereby the spacers areheld in position in the back by said plastic composition, certain ofsaid rows of bristles having their ends arranged between adjacentspacers while other rows are arranged between certain spacers and theflange of said back.

l2. A brush comprising a cup-like 'sheet metal back having a bottom andan upstanding perimetral flange with an inturned edge, said bottom ofthe back having a handle receiving opening, an interiorlylthreadedsocket member in said back in lcontact with said bottom and with itssocket in register with said opening, bristles, a hardened plasticcomposition in said back embedding the ends of said bristles and saidsocket member, and a handle having a threaded end screwed into saidsocket through said opening and a shoulder abutting the outside of saidboton said handle, said hardened plastic composition,

bottom and socket members mutually reenforcing each other. j

3. A brush comprising a cup-like metal back having a bottom and anupstanding perimetral flange, said bottom having a handle receivingopening, a sheet metal interiorly threaded socket shell having` anoutturned perimetral flange mounted on the inside of said back with itssocket registering with said opening, bristles, and a hardened plasticcomposition in said back embedding said bristles and said socket shell.l

4. A brush comprising a cup-like back having a bottom and an upstandingperimetral flange with an inturned edge, a plastic composition in theback, and a plurality of rows of bristles and spacers embedded in -saidcomposition, said spacers having openings through which the compositionextends whereby the spacers are held in position in the back solely bysaid plastic composition, certain of said rows of bristles having theirends arranged between adjacent spacers while other rows are arrangedbetween certain spacers and the ange of the back.

GEORGE JACOB, JR. ERNEST B. WRIGHT. JR.

